Evia weather at a glance
Evia stretches north to south along the Greek mainland. Dirfys rises to 1,743 m, the north faces a gulf, Kymi sits on the Aegean side and Karystos lies near Mount Ochi in the south. One forecast cannot cover all of that, so look up the weather for the town or trail you plan to visit.
The long-term figures below are for September in Chalkida. Use them as a guide for the central part of the island, not as a value for every beach or village. If your plans depend on good conditions, such as a boat trip or a hike, read our Evia tours and day trips and keep a spare day in the schedule.
September in Chalkida
Averages from the weather station at Chalkida, 2011 to 2024.
| Measure | September average | Note |
|---|---|---|
| Daily high | 28.7 °C | Daily maximum, averaged over the month |
| Daily low | 20.3 °C | Daily minimum, averaged over the month |
| Rainfall | 26.5 mm per month | A monthly total, not a daily value |
The station stands at 200 m above sea level, not on the shore, so readings at the waterfront can differ. These are averages. Single years, and single days, can be warmer, cooler or wetter.
Our pick: a day at sea
A full day on a fishing boat suits settled weather, so ask when you book how the weather affects the departure.
Hand-picked tours, booked through GetYourGuide. Prices are indicative starting prices in euros (as of October 2026). Tap a tour for live availability and the current price in your currency.
Evia tours and day trips
Boat trips, hikes and guided day trips on Evia, with live prices and availability.
How the weather differs across the island
Plan by area, not by island.
The northern gulf
Limni and Edipsos face the northern Evian Gulf. The ferry from Arkitsa to Loutra Edipsou and the one from Glyfa to Agiokampos depend on sea conditions, so check the day's sailings when the forecast is rough.
Limni guide →Chalkida and Eretria
The centre is the easiest part of the island to reach and the easiest to plan around the weather. Chalkida has museums and a fortress, and Eretria has a museum and an ancient site. The current in the Euripus strait changes direction about every 6 hours, with irregular changes on some days of the month. It is a feature to watch, not a daily timetable.
Chalkida guide →The Aegean coast and Kymi
Kymi is the harbour on the Aegean side. Do not assume calm water or no wind on this coast. For the ferry to Skyros, check the current timetable and the weather on the day.
Mountains and gorge
Hiking trails near Steni on the slopes of Dirfys, and the long Dimosari route of about 10 km, depend on the weather and on the state of the path. A beautiful forecast does not prove that a trail is open or safe. Read the conditions before you set out.
Dimosari Gorge guide →The south
Karystos lies by the sea with Mount Ochi behind it. Do not assume that mountain roads and unpaved tracks are passable. Ask locally before you drive up.
Karystos guide →Seasonal rules that matter more than the thermometer
Opening seasons in 2026.
| Place | Summer season | Winter season |
|---|---|---|
| Karababa fortress, Chalkida | 1 April to 31 October, 08:30–15:30, closed Tuesday | 1 November to 31 March, Friday to Sunday only, 08:30–15:30 |
| Archaeological museums in Chalkida and Eretria | 08:30–15:30, closed Tuesday | 08:30–15:30, closed Tuesday |
| Public thermal bath, Edipsos | 6 July to 30 or 31 October 2026, daily 08:00–16:00, outdoor pool only | – |
The museums also offer free entry on the first Sunday of each month from November to March, and possibly on the third Sunday as well, so check the date. The last entry is 20 minutes before closing. The museums close at 15:30, so keep a rainy-day visit for the morning or early afternoon.
In summer, authorities announce days of very high fire risk on Evia. Follow the civil protection notices and the advice of local people on those days.
Ferry crossings and timetables also change with the season. Be at the port 30 to 60 minutes early on the Arkitsa and Glyfa routes. On the Rafina to Marmari route, passengers should arrive 30 minutes early and vehicles 1 hour early. Our guide to getting to Evia from Athens has the fares.
Plan the rest of your trip
Where the weather fits in.
Evia weather: frequently asked questions
What is the weather like in Evia in September?
In Chalkida the average daily high is 28.7 °C and the average low is 20.3 °C, with 26.5 mm of rain over the month. The figures cover 2011 to 2024. Other parts of the island can differ.
When is the best time to visit Evia?
That depends on what you want to do. The archaeological museums keep the same hours in summer and winter, the Karababa fortress opens fewer days from November to March, and the public thermal bath runs only in its summer season. Match the month to your list of sights.
Is the weather the same across the whole island?
No. The island has mountains up to 1,743 m, a northern gulf, an Aegean coast and a southern tip. Check the forecast for the place you will be in on the day.
Do ferries to Evia run in bad weather?
Sailings depend on sea conditions and on the season's timetable. Check the day's departures before you drive to the port, and arrive early with a vehicle.
Can I rely on the museum hours in winter?
The Chalkida and Eretria museums list the same hours in winter as in summer. Karababa is the exception: from 1 November to 31 March it opens Friday to Sunday only. They close on 1 January, 25 March, 1 May, Easter Sunday and 25 and 26 December.